The hardware part of installation functionally includes two fundamental blocks - measuring (measure r) and calculating (calculater). In the measur ing block informative parameter (phase shift) is extracted, and analog -digital transformat ion is proceeded. The measur ing block includes: radiator, high - stabile 20 kH z generator, controll ed divi der, transform er meander in to sin us, giving level schem e, power amplifier, two receiving transform ers (one in each semichannel), two schemes of automat ic amplifier adjustment; two transfor mers sin us into meander, two controll ed phase shifters, schem e of selections frequency control.

The calculator includes: two binary code form ers, two averaging schem es, converter, substractin g binary numbers, g ot in the two semich ann els and transformin g the binary code into binary-decimal one, indicator.

The signals are synchrotreated in both semichann els. The temperature instability coefficient for quartz generator is 10 -6, that suppl ies sufficient accuracy of filling the informative pulse by the tact one s, and also the stabil ity of the radiat ed vibrations frequency. In the control led diviser the assumed frequ ency is divided to the value, corresponding to the radiat or resonance - 10.3 kH z with possible maxim um deviation - 1 H z. Such instability allows to have stab ile amplif ication in the receiv ing transducer. But really the frequency 20 kH z suppli es sensitivity of the anemometer to the flow speed 0.01 m/s, corresponding to the time interval o f 50 nanoseconds. The changing of divisor coefficient by the unit causes the changing of frequency at the exit for ±10 H z in the range of 10-12 kH z.

Thus, generator and programm ed divisor has the foll owing functions:

- creat e the possibility of radiator frequency adjusting;

- supply stabile high-frequency filling of informative time interval with necess ary step;

- define support frequencies for control signals forming.

On the radiating ceramic s element periodical voltage (4- 10) V must be applied. To form such signal, sequence of rectangular pulses of resonance or near to it frequ ency has to be transform ed into sinosoidal and strengthen. The level giving schem e match es the low frequencies filter exit with the entrance of the power amplifier and semu ltan eously smooth tuning of signal level. The choice of vibration s amplitude of the radiator is being produced with the reference of two conflicting to each other considerations. On the one hand, increasing o f the transformer signal causes warming of it and, consequently, changing of it s characteristic s. Besides, appearing warm asym metric al field in the anemometer channel results to the nonidenti cal sound speed value in semichannels. On the other hand, decreasing of vibration signal amplitude on the radiating element can cause reduction of measurement accuracy. In the aerometric installation anemometer the radiated through base L = 0.5 m and for it signal level on the receiver may be (1-10) mV when amplitude on the radiator - 2V. Power amplifier implemented with the use of microscheme, designed to work with the load of about unit s of O m. The received signal is reinforced to the value, necessary for normal work of schem e of the automatic amplification adjustment (5V). Besides the characteristics of the controll ed medium - temperature, moistour, pressure, which influence on the sound speed is compensated by the existence of two semichannals , the informative parameter - phase shift is subjected to the influence of the electron schemes characteristics. So receiving amplifier has not to bring phase shift more than 40 nanoseconds. To broaden the dynamic range of the input pulses in the receiving tract non linear amplifier providing the ratio of maximum to minimum signals equal to 40 is used.